JPS6211706Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an adjustment mechanism for a select switch for an automatic transmission.

A select switch used in automatic transmissions such as automobiles is a switch that performs switching operation in synchronization with the range selection valve of the automatic transmission's hydraulic control device, and is thereby used to start the engine,
This controls the lighting of the reverse lamp, etc. Therefore, the select switch must operate in accurate synchronization with the range selection valve, but simply connecting the selection switch to the member that moves the range selection valve will not work correctly due to dimensional errors and play. Unable to get synchronization. Therefore, an adjustment mechanism is required for fine adjustment after the select switch is installed.

2. Description of the Related Art Conventional automatic transmission select switch adjustment mechanisms include those shown in FIGS. 1 and 2, for example. The select switch 1 has a centering boss 1a at the center of the lower side (on the left side in FIG. 2), and has three mounting parts 1c with long holes 1b for mounting at the periphery. As a result, it is positioned and fixed to the transmission case 2 of the automatic transmission. That is,
The center position of the select switch 1 is determined by fitting the centering boss 1a of the select switch 1 into the positioning hole 2a provided in the transmission case 2, and the bolt is inserted through the elongated hole 1b of the three mounting parts 1c. 3 loosely screwed into the screw hole 2c provided in the boss portion 2b of the transmission case 2 for temporary installation. Inside the select switch 1, a movable plate (not shown) that supports a movable element that contacts a contact point is provided so as to be rotatable around the center of the select switch 1. A shaft 1d (or integral with the movable plate) projects above the select switch 1. A screw is formed at the tip of the shaft 1d, and the screw and nut 4 fix the movable arm 5 to the shaft 1d so as to rotate together with the screw. A slit 5a is formed at the end of the movable arm 5, and a pin 6a of the drive arm 6 is engaged with this slit 5a. The drive arm 6 is rotatable around a shaft portion 6b supported by the transmission case 2, and rotates in conjunction with a range selection valve (not shown) in the transmission case 2. It's like this. In this temporarily installed state, rotate the select switch 1 appropriately around its centering boss 1a (it can be rotated because the hole in the mounting part 1c is an elongated hole 1b), and each range of the range selection valve is rotated. Adjust so that each contact contact position of the select switch 1 corresponds accurately to the position of the drive arm 6 corresponding to be.

However, in such a conventional select switch adjustment mechanism, the select switch 1
Since the center position of the select switch 1 is determined using the centering boss 1a, the dimension in the axial direction increases by the length of the centering boss 1a. This requires a large space around the select switch 1, and it is also necessary to provide a hole 2a in the transmission case 2 to receive the centering boss 1a.
There was a problem in that a boss part had to be formed and processed.

The present invention has been developed in view of these conventional problems, and aims to solve the above problems by using a centering bracket to determine the center position of the select switch.

Hereinafter, the present invention will be explained based on FIGS. 3 to 8 of the accompanying drawings showing one embodiment thereof.

The select switch 10 shown in FIGS. 3 and 4 is
Three mounting parts 10b with long mounting holes 10a
It has a cylindrical part 10c on the peripheral part, and a cylindrical part 10c which is one step higher than the surface of the mounting part 10b. FIGS. 5 and 6 show a bracket 11 having an inner diameter portion 11a which is a mating portion with which the cylindrical portion 10c can be mated, and this bracket 11 also has three attachment portions 11b on its periphery. There is. A mounting hole 11c is formed in the mounting portion 11b of the bracket 11, into which a mounting bolt 12, which will be described later, is engaged. The cylindrical part 10c of the select switch 10 is fitted to the inner diameter part 11a of the bracket 11, and a mounting bolt is inserted into the screw hole 13b formed in the boss part 13a of the transmission case 13, as shown in FIGS. The select switch 10 is temporarily installed by loosely screwing in the select switch 12. Three mounting holes 11 provided in the bracket 11
Since c is not an elongated hole, the bracket 11 is positioned by the three mounting bolts 12, and its inner diameter portion 11a is also positioned. Since the cylindrical portion 10c of the select switch 10 is engaged with this inner diameter portion 11a, the center position of the select switch 10 (the center of the cylindrical portion 10c) is determined. A shaft portion 14a projects from the center of the select switch 10, and this shaft portion 14a is integral with a movable plate 14 rotatably disposed within the case 10' of the select switch 10. A movable element 15 made of a highly conductive material and slidably disposed in a hole 14b provided in the movable plate 14 is attached to a spring 17 toward a cover 10'' fixed to a case 10' of the select switch 10 with screws 16. The housing of the select switch 10 is formed by the case 10' and the cover 10''. A plurality of pairs of contacts 18a and 18b are provided in the cover 10'' at positions through which the movable element 15 passes when the movable plate 14 rotates.Furthermore, in another hole 14c provided in the movable plate 14, a plurality of pairs of contacts 18a and 18b are provided. , a ball 20 is provided that is pressed toward the case 10' by a spring 19, and a select switch 10 is correspondingly placed at a predetermined position on the case 10' side.
The number of check grooves 1 corresponds to the number of selection positions.
0'a is provided. By doing this, the movable plate 14 stably stands still at the position where the ball 20 engages with the check groove 10'a, and when the ball 20 engages with a specific check groove 10'a,
Correspondingly, the movable element 15 selects a predetermined pair of contacts 18.
a, 18b. Case 1
Seal members 21 and 22 are arranged between the case 10' and the cover 10'' and between the case 10' and the shaft portion 14a, respectively, to prevent water, dust, etc. from entering. A movable arm 23 is provided at the tip of the aforementioned shaft portion 14a that protrudes upward from the
is attached and fixed with a nut 24 so as not to come off. Note that the engagement portion between the shaft portion 14a and the movable arm 23 has a non-circular shape (for example, a shape in which two symmetrical points of a circle are cut off in parallel);
This allows the shaft portion 14a and the movable arm 23 to engage only in a certain angular positional relationship, and allows the shaft portion 14a and the movable arm 23 to rotate together and transmit rotational force between them. It is set as. A slit 23a is formed at the end of the movable arm 23, and a pin 25a of the drive arm 25 is engaged with this slit 23a. The drive arm 25 has a shaft portion 25 supported by the transmission case 13.
It is rotatable around b, and is adapted to rotate in conjunction with a range selection valve (not shown) in the transmission case 13. In this temporarily installed state, select switch 10
is rotated while being engaged with the inner diameter part 11a of the bracket 11 (the hole in the mounting part 10b is connected to the elongated hole 10a).
, so it can be rotated. Note that the same purpose can be achieved by using a circular hole with a large diameter instead of a long hole. In this specification, the term "elongated hole" is used to include these holes. ), the position of the drive arm 25 corresponding to each range of the range selection valve, and the selection switch 1
Adjustment is made so that the positions where the movable element 15 in 0 contacts each contact point 18a, 18b correspond accurately. That is, when the range selection valve is in the N (neutral) range, for example, the ball 20 in the select switch 10 engages with the check groove 10'a for the N range, and the movable element 15 closes the N range contacts 18a, 18b. position it at the top. After this, the mounting bolts 12 are strongly tightened to securely attach the select switch 10 to the transmission case 13.

The select switch 10 adjusted and installed as described above operates as follows. That is,
When the range selection valve is moved by the driver's operation, the drive arm 25 rotates in conjunction with this movement.
The rotation of the drive arm 25 is controlled by the movable arm 2 via the pin 25a.
3 and further connected to the shaft portion 14a.
is transmitted to the movable plate 14 through the movable plate 1
4 rotates corresponding to the range selection valve. In this way, the movable element 15 is connected to a predetermined contact point 18 corresponding to each range position of the range selection valve.
a, 18b, each pair of contacts 18a, 18b
Make conduction between. As a result, necessary operations are performed in each range, such as turning on the vehicle's reverse light in the R (reverse) range.

As explained above, according to the present invention, the centering boss conventionally provided on the select switch is abolished, and the cylindrical part of the select switch housing is installed at the engagement part of the bracket attached to the transmission case. The adjustment mechanism of the select switch is configured so that the center position of the select switch is determined by mating with each other, making it possible to design the area around the select switch compactly. Since the hole is not required, the structure of the transmission case can be simplified, and machining is not required, resulting in a reduction in cost.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional select switch adjustment mechanism, Fig. 2 is a partial sectional view taken along the - line of the select switch adjustment mechanism shown in Fig. 1, and Fig. 3 constitutes a select switch adjustment mechanism according to the present invention. 4 is a side view of the select switch shown in FIG. 3, FIG. 5 is a front view of the bracket of the select switch adjustment mechanism according to the present invention, and FIG. 6 is a front view of the bracket shown in FIG. 5.
7 is a front view of the select switch adjustment mechanism according to the present invention, and FIG. 8 is a sectional view taken along the - line of the select switch adjustment mechanism shown in FIG. 7. 10...Select switch, 10'...Case, 10''...Cover, 10a...Elongated hole for mounting,
10b... Attachment part, 10c... Cylindrical part, 11...
...bracket, 11a...inner diameter part (fitting part),
11c...Mounting hole, 12...Mounting bolt, 13
...transmission case, 14...movable plate, 15...mover, 16...screw, 17...spring, 18a, 18b...contact, 19...spring, 2
0... Ball, 21, 22... Seal member, 23
...Movable arm, 24...Natsuto, 25...Driving arm.

Claims (1)

[Claim for Utility Model Registration] Direction of rotation of a select switch that synchronizes the connection positions of each contact provided in the housing of the select switch and the mover with each range position of the range selection valve of the hydraulic control device of the automatic transmission. This is an adjustment mechanism for a select switch for an automatic transmission, in which the select switch housing is attached to the transmission case using mounting bolts through an elongated mounting hole provided in the select switch housing to enable adjustment work. In this case, the housing of the select switch has a cylindrical part formed concentrically with the rotary axis of the mover, and the mating part of the bracket is engaged with this cylindrical part, and the bracket is connected to the housing of the select switch. It has a mounting hole provided at a position corresponding to the elongated mounting hole of the bracket, and the mounting bolt that passes through the mounting hole of the bracket and the elongated mounting hole of the select switch housing secures the bracket and select switch. The housing is fixed to the transmission case, and the bracket is positioned by the fit between the mounting hole and the mounting bolt, while the select switch housing has a cylindrical portion when the mounting bolt is loosened. An adjustment mechanism for a select switch for an automatic transmission, characterized in that the select switch can be rotated by the amount of clearance between an elongated mounting hole and the mounting bolt when the switch is engaged with a mating portion of a bracket.